Everything you need.

This Shimano E-Tube Di2 Complete Wire/Power Kit is a complete kit and contains all the necessary parts to hook up your Di2 electronic components. You'll get five wire components, including a front wire harness, down tube wires, wires for both derailleurs, and a battery and charger to send juice through those wires. The front wire harness has an integrated A junction, but the B junction is a separate unit. You'll get that as well. The kit also includes a battery and battery mount along with a charger and cable.

We have the E-Tube Di2 Complete Wire/Power Kit in a number of wire length options to fit differently sized frames. You can also choose between the internal or external battery mount. For bikes designed to accept it, the Internal kit will route the wires, B Junction, and battery inside the frame tubes. Conversely, the External kit routes all the wires and battery externally.

Shimano

Di2 Reference Guide

Battery and Wires: Our Shimano Di2 packages are built for three standard configurations based on battery location and wire routing. First, you'll need to determine if your frame uses an internal or external battery mount, and whether the routing is either internal or external. Below is a guide for which battery, charger, mount, and junction boxes are required for your configuration.

Battery & Wire Configurations

Battery

Battery Charger

Battery Mount

Junction A

Junction B

External Battery

with External Routing

SM-BTR1

SM-BCR1

SM-BMR2

SM-EW90 A/B 3/5 port

SM-JC40

External Battery

with Internal Routing

SM-BTR1

SM-BCR1

SM-BMR2

SM-EW90 A/B 3/5 port

SM-JC41

Internal Battery

with Internal Routing

SM-BTR2

SM-BCR2

SM-EW90 A/B 3/5 port

SM-JC41

Battery Mounts: The SM-BMR2 battery mount is available in three configurations -- Long External, Short External, and Long Internal. Both Long versions are to be mounted using the bottle cage mounts, while the Short version is designed for Di2-specific frames with either a chainstay or down tube mounting location.

Junctions: There are two junctions needed for completing your Di2 build -- A and B. Junction A, SM-EW90, is located at the handlebars and available in both three- and five-port options. The three-port option is intended for standard shifting with a left and right hand shifter. If you have the intention of using Shimano's satellite sprint shifters, or a combination of time trial shifters and shifter/brake levers, the five-port junction box will be the necessary selection.

Depending on your frame specification, Junction B (SM-JC40 or SM-JC41) is located either internally or externally at the bottom bracket area. Accordingly, SM-JC41 is designed for frames with internal wire routing, while SM-JC40 is intended for external wiring options.

E-Tube Wires: For your convenience, we've created wire packages for your Di2 build kit in the sizes Small, Medium, and Large. Below, you'll find which wire lengths are included in each kit. Additionally, we've recommended a kit size based on your frame size.

E-Tube Wire Length Chart

S

M

L

Down Tube Wire

700mm

750mm

950mm

Front Derailleur Wire

300mm

350mm

400mm

Rear Derailleur Wire

500mm

550mm

600mm

Battery Wire

300mm

350mm

400mm

Note: E-Tube Wire Length Suggestions are an approximation.

E-Tube Wire Frame Size Guide

S

M

L

Frame Size

47 - 52cm

53 - 56cm

57cm+

Note:

This reference is meant to be used as a guide for creating a Shimano Di2 drivetrain package. For further assistance please feel free to give us a call.